Drilling machine with sectional crank



Jan. 22, 1929. 1,700,039 G. W. GAGE DRILLING MACHINE WITH SECTIONALCRANK yled Jpme 1926 I j ayeflia,

Patented Jan. 22, 1929,

PATENT OFFICE.

GEORGE WELLINGTON GAGE, F PARNASSUS, PENNSYLVANIA.

DRILLING MACHINE WITH SECTIONAL CRANK.

Application filed June 7, 1926. Serial No. 114,373.

This invention relates to improvements in by the other pin 11 and aspring 1 1 is ardrilling machines, the general object of the, inventionbeing to provide a frame with a solid boxing and a sectional crank shaftrotatably mounted in the boxing, with gears for rotating the bit shaftfrom the crank shaft.

This invention also consists in certain other features of constructionand in the combination and arrangen'ient of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in Which: I

Figure 1 is an elevation with parts in section, of the invention.

Figure 2 a section on line 22 of Figure 1.

l n these views, 1 indicates the frame which is provided with theopening 2 and the boss 23 projecting into the opening, with the socketin the boss in alignment with the bore 4 formed in the outer part of theframe, this boss and the socket forming bearings for the shaft which isadapted to be attached to the tool or bit and which passes through theopening 2. A beveled gear 6 is attached to that part of the shaft whichpasses through the opening 2. A transversely arranged bore 7 is arrangedin the frame and its side extensions 8 and a sleeve 9 is rotatablymounted in this bore. The inner end of a crank 10 projects intoeach endof the sleeve and these cranks are attached to the sleeve by the pins11. Thus the sleeve and cranks form a sectional double crank. A beveledgear 12 is fastened to the double crank by one of the pins 11 and thisgear meshes with the gear 0. A collar 13 is fastened. to the doublecrank ranged on the crank between an extension 8 and the collar andtends to hold the gear 12 in mesh with the gear 6. A hollow stem 15 isadjustably connected to a stud 16 threaded in the frame and a breastplate 17 is fastened to the outer end of the stem. Handles 18 arerotatably connected with the extremities of the double crank by the nuts19.

From the foregoing, it will be seen that I have produced a simple formof drill, the bit of which is rotated by turning a double crank, themotion of the crank being trans- I mitted to the bit carrying member bygears.

By making the crank in sections, it can be placed in the bore of theframe so that the frame can be made solid.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claim.

What I claim is I A drilling device of the class described, comprising aframe having a transverse hearing bore formed therein, a sleeverotatably mounted in the bore and having its ends projecting therefrom,cranks having their inner ends extending into the ends of the sleeve, agear on one end of the sleeve, a collar on the other end of the sleeve,pins for connecting the gear and collar to the sleeve and the sleeve tothe cranks, a bit carrying shaft journaled in the frame, a gear on saidshaft meshing with the gear on the sleeve and a spring on the sleeve andbearing against the collar for holding the parts with the gears in mesh.

In testimony whereof I aflix my signature.

GEORGE IVELLINGTON GAGE.

